Juniper MX2020 Hardware Manual page 211

Figure 71: AC PDM Three-Phase Wye Input Power
AC PS_0
2800W
input
NE1
A1
B1
C1
AC PSM VIN=200-240 single phase:
a. Two AC PSMs are connected in parallel between two lines and neutral.
b. Nominal value of input current for one AC PSM is 2800 W/200 V=14 A.
c. Nominal input current for two AC PSMs is 2*14 A=28 A.
d. Nominal value of line current is 28 A.
e. So, input #1 rated current is 28 A.
f. Only one AC PSM is connected between two lines and neutral.
g. Nominal value of input current for one AC PSM is 2800 W/200 V=14 A.
h. Nominal value of line current is 14 A.
i. Current rating for input #2 is 14 A.
5. Calculate thermal output (BTUs). Multiply the input power requirement (in watts) by 3.41 as shown in
Table 67 on page 190.
AC PS_1 AC PS_4
2800W 2800W
input input
AC PS_3 AC PS_2 AC PS_5
2800W 2800W 2800W
input input input
AC PS_7
2800W
input
AC PS_6 AC PS_8
2800W 2800W
input input
NE2
A2
B2
C2
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